Math & Numbers Calculators
Algebra, geometry, statistics, and number theory calculators. From basic percentage calculations to standard deviation, matrix operations, and probability. Every tool shows the formula and works through the solution step by step.
- ✓Algebra: quadratic formula, exponents, logarithms, slope
- ✓Geometry: area, volume, circle, triangle, Pythagorean theorem
- ✓Statistics: standard deviation, mean/median/mode, probability, p-values
- ✓Number theory: prime factorization, GCF/LCM, number base conversion
Most used: Percentage Calculator, Area Calculator, Standard Deviation Calculator
Try any of the 30 math & numbers calculators below — or get one free for your AI.
Every calculator on this page is free to use right now. You can also download any one as a Claude skill file (free with email) to chat with it in Claude Code, ChatGPT, or any AI platform. Or get the full Math Toolkit Pack for $29.
Common workflows in this category
Click any scenario to jump into the calculator with the example pre-loaded.
30 free calculators
Area Calculator
Calculate area for squares, rectangles, triangles, circles, trapezoids, and more. Essential for construction, landscaping, and geometry.
Average Calculator
Calculate the average (arithmetic mean) of any list of numbers instantly. Essential for grades, scores, statistics, and data analysis.
Circle Calculator
Calculate any circle property from any known measurement. Circumference, area, diameter, and radius instantly with perfect accuracy.
Combinations Calculator
Find combinations and permutations instantly. Perfect for probability, lottery odds, team selection, and statistics problems.
Exponent Calculator
Calculate powers and exponents of any base and exponent. Positive, negative, and fractional exponents supported.
Fraction Calculator
Add, subtract, multiply, and divide fractions with full step-by-step work. Get simplified results and improper-to-mixed conversions.
GCF and LCM Calculator
Calculate GCF (greatest common factor) and LCM (least common multiple) for any set of numbers instantly.
Logarithm Calculator
Calculate logarithms instantly. Common log (base 10), natural log (base e), and any custom log base supported.
Long Division Calculator
Perform long division with complete step-by-step instructions. Learn how division works while getting instant answers.
Matrix Calculator
Perform matrix operations: addition, multiplication, determinant, and inverse calculations for linear algebra and engineering.
Mean, Median, Mode Calculator
Calculate mean (average), median (middle), and mode (most frequent) for any dataset instantly with step-by-step breakdown.
Modulo Calculator
Calculate remainders from division instantly. Essential for modular arithmetic, programming, cryptography, and number theory problems.
Number Base Converter
Convert between hexadecimal, binary, octal, and decimal number systems. Essential for programming, web design, and computer science.
P-Value Calculator
Calculate p-values from z-scores or t-scores. Determine if your research results are statistically significant (p < 0.05).
Percentage Calculator
Instantly calculate what percent is X of Y, find X% of any number, and measure percentage changes-no manual math needed.
Percentage Increase Calculator
Calculate percentage increase or decrease between two numbers instantly. Perfect for growth metrics, price changes, and comparisons.
Prime Factorization Calculator
Break down any number into its prime factors. Get complete factor trees and prime factorization form with step-by-step work.
Probability Calculator
Calculate probability of events, combinations, permutations, and at-least-one outcomes. Step-by-step work with interactive scenarios.
Pythagorean Theorem Calculator
Use the Pythagorean theorem to find any missing side of a right triangle. Enter two sides, get the third with step-by-step work.
Quadratic Formula Calculator
Solve any quadratic equation using the quadratic formula. Find both real roots, complex roots, and see step-by-step work.
Random Number Generator
Generate random numbers in any range. Perfect for lotteries, games, statistical sampling, and fair decision-making.
Ratio Calculator
Simplify ratios, solve proportions, and scale quantities up or down. Essential for cooking, design, construction, and mixing.
Roman Numeral Converter
Convert between Arabic numerals and Roman numerals. Perfect for historical dates, legal documents, and academic work.
Scientific Notation Calculator
Convert between standard form and scientific notation. Add and multiply numbers in scientific notation with step-by-step work.
Significant Figures Calculator
Round numbers to significant figures instantly. Essential for scientific notation, laboratory work, and engineering precision.
Slope Calculator
Calculate slope between two coordinate points. Also get midpoint and distance with step-by-step work shown.
Square Root Calculator
Calculate square roots of perfect and non-perfect squares. Exact answers and decimal approximations in seconds.
Standard Deviation Calculator
Compute standard deviation, variance, and mean for any dataset. Population and sample calculations with step-by-step work.
Triangle Calculator
Calculate missing sides and angles using law of sines, law of cosines, and Heron's formula. Complete triangle solver for any scenario.
Volume Calculator
Calculate volume for cubes, cylinders, spheres, cones, pyramids, and more. Perfect for construction, shipping, and storage planning.